PURPOSE Right internal jugular vein (RIJV) catheterisation is a common procedure in patients undergoing surgery. We aimed to compare diameters and the cross-sectional area (CSA) of the RIJV when the head is in a neutral or 30-degree rotated position during mechanical ventilation in various modes and spontaneous ventilation. METHODS Thirty patients undergoing surgery were included in the study...

BACKGROUND Exogenous catecholamine administration in humans stimulates ventilation. The present study was designed to investigate whether increased endogenous catecholamine release influences objective measures of ventilation and subjective measures of breathlessness in normal subjects. METHODS Yohimbine, a pre-synaptic alpha 2 adrenoceptor antagonist, or placebo was administered to 10 normal...

BACKGROUND During facemask ventilation, gastric insufflation is defined as appearance of a comet-tail or an acoustic shadow on ultrasonography. Ultrasonographic measurement of antral cross-section area (CSA) may reflect an insufflated antrum and provide interesting semi-quantitative data in regard to the gastric insufflation. This study aimed to determine the appropriate level of inspiratory pr...

in this research, recognition of karstic water-bearing zones using the management of exploration data in kal-qorno valley, situated in the tepal area of shahrood, has been considered. for this purpose, the sequential exploration method was conducted using geological evidences and applying remote sensing and geoelectrical resistivity methods in two major phases including the regional and local s...

Hydropneumothorax is an uncommon but potentially fatal complication for a patient undergoing positive pressure ventilation. The case of a 23-year-old woman with severe asthma requiring lung lavage is described. Twenty minutes after an uneventful left lung lavage, the patient experienced increased peak airway pressure, decreased oxygen saturation and hypercarbia, despite ventilation with 90 per ...

Insufficient airflow in the cavity of Double Skin façade (DSF) systems has resulted overheating risk and resulting reduction thermal performance cooling dominant climates. Previous research focused more on buoyancy-driven natural ventilation, there is a lack utilising wind-driven ventilation as force for heat dispersion from cavity. Additionally, geometrical features wind direction influential ...

This paper aims to analyse the state of the art of energy performance simulated control in existing buildings refurbishment. It focuses on the contribution of thermal mass and natural ventilation as strategies aimed at improving passive buildings’ performance in Mediterranean climates represented by three locations, Rome, Neaples and Messina. As for single sided and cross ventilation combined w...

INTRODUCTION To assess the impact of new therapeutic strategies on outcome and cost of hospitalization among patients with myasthenia gravis (MG) who are mechanically ventilated in United States. METHODS Using a retrospective analysis of cross sectional survey, we determined the rates of occurrence, in-hospital outcomes, and mean hospital charges for patients hospitalized with MG requiring me...